atomic number 30 - Dictionary Definition : Vocabulary.com atomic number 30 Definitions of atomic number 30 1 n a bluish-white lustrous metallic element; brittle at ordinary temperatures but malleable when heated; used in a wide variety of alloys and in galvanizing iron; it occurs naturally as zinc sulphide in zinc blende Synonyms: Atomic number 30 - definition of atomic number 30 by The Free Dictionary Atomic number 30 - definition of atomic number 30 by The Free Dictionary Also found in: Thesaurus , Wikipedia . ThesaurusAntonymsRelated WordsSynonymsLegend: Noun 1. atomic number 30 - a bluish-white lustrous metallic element; brittle at ordinary temperatures but malleable when heated; used in a wide variety of alloys and in galvanizing iron; it occurs naturally as zinc sulphide in zinc blende metal , metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. spelter - impure zinc containing about three percent lead and other impurities (especially in the form of ingots) Want to thank TFD for its existence?

Tell a friend about us , add a link to this page, or visit the webmaster's page for free fun content . Link to this page: Copyright © 2003-2017 Farlex, Inc Disclaimer All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Element 30 | Article about Element 30 by The Free Dictionary Element 30 | Article about Element 30 by The Free Dictionary Related to Element 30: Element 31 zinc, metallic chemical element; symbol Zn; at. no. 30; at. wt. 65.38; m.p. 419.58&degC;; b.p. 907&degC;; sp. gr. 7.133 at 25&degC;; valence +2. Zinc is a lustrous bluish-white metal.

It is found in Group 12 of the periodic table periodic table, chart of the elements arranged according to the periodic law discovered by Dmitri I. Mendeleev and revised by Henry G. J. Moseley. In the periodic table the elements are arranged in columns and rows according to increasing atomic number (see the table entitled ..... Click the link for more information. . It is brittle and crystalline at ordinary temperatures, but when heated to between 110&degC; and 150&degC; it becomes ductile and malleable; it can then be rolled into sheets. It is a fairly reactive metal. Although zinc is not abundant in nature, it is of great commercial importance. It is used principally for galvanizing galvanizing, process of coating a metal, usually iron or steel, with a protective covering of zinc. Galvanized iron is prepared either by dipping iron, from which rust has been removed by the action of sulfuric acid, into molten zinc so that a thin layer of the zinc remains on ..... Click the link for more information.

iron, but is also important in the preparation of certain alloys, e.g., Babbitt metal Babbitt metal, an antifriction metal first produced by Isaac Babbitt in 1839. In present-day usage the term is applied to a whole class of silver-white bearing metals, or "white metals. ..... Click the link for more information. , brass brass, alloy having copper (55%–90%) and zinc (10%–45%) as its essential components. The properties of brass vary with the proportion of copper and zinc and with the addition of small amounts of other elements, such as aluminum, lead, tin, or nickel. ..... Click the link for more information. , German silver German silver, name for various alloys of copper, zinc, and nickel, sometimes also containing lead and tin. They were originally named for their silver-white color, but use of the term silver is now prohibited for alloys not containing that metal. ..... Click the link for more information. , and sometimes bronze bronze, in metallurgy, alloy of copper, tin, zinc, phosphorus, and sometimes small amounts of other elements. Bronzes are harder than brasses.

Most are produced by melting the copper and adding the desired amounts of tin, zinc, and other substances. ..... Click the link for more information. . It is used for the negative plates in certain electric batteries and for roofing and gutters in building construction. Since the metal reacts with dilute mineral acid to liberate hydrogen, it is often used for this purpose in the laboratory. Zinc compounds are numerous and are widely used. Perhaps most important is zinc oxide zinc oxide, chemical compound, ZnO, that is nearly insoluble in water but soluble in acids or alkalies. It occurs as white hexagonal crystals or a white powder commonly known as zinc white. ..... Click the link for more information. , or zinc white, a versatile compound with many uses. Other zinc compounds include zinc chloride, used as a wood preservative, in soldering fluxes, as a mordant in dyeing textiles, and in adhesives and cements; and zinc sulfide, used in making lithopone as well as television screens and X-ray apparatus. The chromate, zinc yellow, serves as a pigment; sodium zincate, as a water softener and as a flocculating agent in water purification.

The crystalline sulfate is known commonly as white vitriol. Zinc is essential to the growth of many kinds of organisms, both plant and animal. It is a constituent of insulin, which is used in the treatment of diabetes. Zinc supplements, taken at the first appearance of symptoms, may reduce the severity of the common cold. Research suggests that a zinc deficiency can lead to excessive inflammation when the immune system responds to infection, and that zinc acts to slow the immune response, limiting inflammation. Chief sources of zinc are the sulfide ore, zinc blende, or sphalerite sphalerite , mineral composed of zinc sulfide, usually containing some iron and a little cadmium. It occurs in crystals of the isometric system but more generally in cleavable, compact masses. ..... Click the link for more information. (called also blende or "black Jack"); zincite, an oxide; calamine, a silicate; and smithsonite, the zinc carbonate. Zinc ores are widely and abundantly distributed throughout the world. The United States is the leading producer. The metallurgy of zinc depends upon the ore used.

The sulfide ore is roasted to the oxide, then mixed with coal and heated to 1,200&degC;. The zinc vaporizes and is condensed outside the reaction chamber and cast into blocks called spelter. In another method the ore is processed by flotation, filtering, roasting, and leaching; the resulting solution is filtered and the zinc removed by electrolysis. zinc A hard bluish-white metal, brittle at normal temperatures, very malleable and ductile when heated; not subject to corrosion; used for galvanizing sheet steel and iron in various metal alloys. See also: Metal Zinc Zn, a chemical element of Group II of Mendeleev’s periodic system. Atomic number, 30; atomic weight, 65.38. A bluish white metal, zinc occurs in the form of five stable isotopes, with mass numbers 64, 66, 67, 68, and 70. 64Zn is the most widespread isotope, accounting for 48.89 percent.

Nine artificial zinc radioisotopes have been obtained, of which 65Zn, with a half-life of 245 days, is the longest lived and is used as an isotopic indicator. History. Brass, an alloy of zinc and copper, was known to the ancient Greeks and Egyptians. Pure zinc could not be isolated for a long time. In 1746, A. S. Marggraf developed a method for the production of metallic zinc that involved heating a mixture of zinc oxide and coal without air in clay refractory retorts, followed by condensation of the zinc vapor. The industrial production of zinc was begun in the 19th century. Distribution in nature. The average content of zinc in the earth’s crust (clarke) is 8.3 × 10–3 percent by weight. The zinc content in basic igneous rocks is somewhat higher (1.3 x 10–2 percent) than in acid rocks (6 × 10–3 percent).

A total of 66 minerals of zinc are known, the most important of which are zincite, sphalerite, willemite, calamine, smithsonite, and franklinite, ZnFe2O4) (see ZINCITE; SPHALERITE; WILLEMITE; CALAMINE SMITHSONITE ). Zinc is an energetic water migrant. Its migration in thermal waters together with lead is especially characteristic. Zinc sulfides, which have great industrial significance, precipitate from these waters (see COMPLEX ORE ). Zinc also actively migrates in surface and underground waters. The major precipitant of zinc is H2S, while sorption by clays plays a lesser role. Zinc is an important biogenic element; its average content in living matter is 5 × 10–4 percent, although there exist some organisms that concentrate zinc, such as some violets. Physical and chemical properties. Zinc is a metal of medium hardness. When cold, it is brittle; however, at temperatures of 100°–150°C, it is extremely ductile and readily rolled into sheets and foil hundredths of a millimeter thick.

At 250°C, it again becomes brittle. Zinc does not have polymorphic modifications. It crystallizes jn a hexagonal lattice, with parameters a = 2.6594 angstroms (Å) and c = 4.9370 Å. The atomic radius is 1.37 Å, and the ionic radius of Zn2+ is 0.83 Å. The density of solid zinc is 7.133 g/cm3 (at 20°C), while the density of liquid zinc is 6.66 g/cm3 (at 419.5°C). Zinc has a melting point of 419.5°C and a boiling point of 906°C.

The linear coefficient of thermal expansion is 39.7 × 10–6 (between 20° and 250°C), the thermal conductivity is 110.950 W/(m.°K), or 0.265 cal/cm·sec·°C (at 20°C), the electrical resistivity is 5.9 × 10–6 ohm· cm (at 20°C), and the heat capacity is 25.433 kilojoules/(kg–°K), or (6.07 cal/(g–°C). The tensile strength is 200–250 meganewtons/m2, or 2,000–2,500 kilograms-force/cm2, the specific elongation is 40–50 percent, and the Brinell hardness is 400–500 meganewtons/m2, or 4,000–5,000 kilograms-force/cm2. Zinc is diamagnetic, with a magnetic susceptibility of –0.175 × 10–6.

The electronic configuration of the Zn atom’s outer shell is 3d104s2. Zinc exhibits an oxidation number of + 2 in all of its compounds. Its standard oxidation-reduction potential, equal to 0.76 volt, characterizes zinc as a reactive metal and active reducing agent. Zinc rapidly tarnishes in the presence of air at temperatures up to 100°C and becomes covered by a surface layer of basic carbonates. In moist air, especially in the presence of CO2, metallic zinc is decomposed even at ordinary temperatures. Upon strong heating in the presence of air or oxygen, zinc actively burns with a bluish flame, with the formation of a white smoke of zinc oxide, ZnO. Dry fluorine, chlorine, and bromine do not react with zinc at cold temperatures, but in the presence of water vapor, zinc may ignite, forming, for example, ZnCl2. A heated mixture of zinc powder and sulfur yields zinc sulfide, ZnS. Zinc sulfide precipitates upon the action of hydrogen sulfide on weakly acidic or ammonium aqueous solutions of zinc salts.

The hydride ZnH2 is obtained in the reaction of LiAlH4 with Zn (CH3)2 and other zinc compounds; a metal-like substance, it decomposes upon heating into its elements. The nitride Zn3N2, a black powder, is formed upon heating zinc to 600°C in a stream of ammonia; it is stable in the air at temperatures to 750°C and is not decomposed by water. Zinc carbide, ZnC2, is produced by heating zinc in a stream of acetylene. Strong mineral acids vigorously dissolve zinc, especially upon heating, with the formation of the corresponding salts. Upon reaction with dilute HCl and H2SO4, H2 is liberated while with HNO3, NO, NO2, and NH3 are also liberated. Zinc reacts with concentrated HCl, H2SO4, and HNO3, liberating H2, SO2, NO. and NO2. Solutions and melts of alkalies oxidize zinc with the liberation of H2 and the formation of water-soluble zincates. (see ZINC ATE ).

The intensity of the action of acids and alkalies on zinc depends on the presence of impurities. Pure zinc is less reactive toward these reagents owing to the hydrogen overstress on it. In water, zinc salts are hydrolyzed upon heating, forming a white precipitate of zinc hydroxide, Zn(OH)2. Complexes containing zinc, such as [Zn(NH3)4]SO4, are known. Preparation. Zinc is obtained from complex ores containing 1–4 percent zinc in the form of a sulfide, as well as Cu, Pb, Ag, Au, Cd, and Bi. These ores are concentrated by selective flotation, yielding zinc concentrates containing 50–60 percent zinc, as well as lead, copper, and sometimes pyrite concentrates. Zinc concentrates are roasted in a fluidized-bed furnace, in the course of which zinc sulfide is converted into zinc oxide, ZnO; the sulfur dioxide, SO2, formed in this process is used in the production of sulfuric acid. There are two ways of obtaining zinc from zinc oxide.

In the pyrometallurgical, or distillation, method, which has long been known, the roasted concentrate is subjected to sintering to impart granularity and gas permeability and is then reduced by coal or coke at 1200°–1300°C: ZnO + C = Zn + CO. The metallic zinc vapor produced in this process is condensed and poured into ingot molds. Initially, the reduction was conducted manually only in retorts made of fire clay. Later, mechanized vertical retorts made of Carborundum came into use, and then shaft and arc furnaces. Zinc is produced from lead-zinc concentrates in shaft furnaces with hot blasting. Although the efficiency of these processes gradually increased, the zinc produced still contained as much as 3 percent impurities, including valuable cadmium. Zinc obtained by distillation is purified by liquation, in which the liquid metal is separated from the iron and some of the lead at 500°C; this method of purification yields zinc that is 98.7 percent pure.

Rectification, a more complex and expensive method of purification, is used occasionally; it yields metallic zinc that is 99.995 percent pure and makes it possible to extract cadmium. The major method for the production of zinc is the electrolytic, or hydrometallurgical, method. Roasted zinc concentrates are treated with sulfuric acid. The sulfate solution obtained is purified to eliminate impurities (by precipitation using zinc dust) and subjected to electrolysis in tanks thickly lined with lead or polyvinyl chloride plastic. Zinc is deposited on aluminum cathodes, from which it is hand-stripped daily and then smelted in induction furnaces. Electrolytic zinc is 99.95 percent pure, and its recovery from concentrates (taking into account processed wastes) is 93–94 percent. Zinc vitriol (zinc sulfate), Pb, Cu, Cd, Au, and Ag are obtained from zinc production wastes, as well as, occasionally, In, Ga, Ge, and Tl. Uses. About one-half of the zinc produced is used to protect steel from corrosion (see ).

Since zinc precedes iron in the electromotive series, it undergoes decomposition when galvanized iron is introduced into a corrosive medium. As a result of its good casting properties and low melting point, zinc is used for the pressure casting of many small parts of airplanes and other machines. Alloys of zinc with copper—brass and nickel silver—are commonly used in industry, as are alloys of zinc with lead and other metals (see ). Zinc yields intermetallic compounds with gold and silver, which are insoluble in molten lead, and thus zinc is used in the refining of lead to remove noble metals. In powdered form, zinc is used as a reducing agent in many industrial chemical processes: in the production of hydrosulfite, in the precipitation of gold from industrial cyanide solutions, and in the precipitation of copper and cadmium in the purification of zinc vitriol solutions. Many zinc compounds are luminophores, for example, the three basic colors on the kinescope screen depend on ZnS·Ag (blue color), ZnSe·Ag (green color), and Zn3(P04)2·Mn (red color).

Type AIIBVI zinc compounds, such as ZnS, ZnSe, ZnTe, and ZnO, are important semiconductor materials. Soviet brands MN and NN magnetically soft ferrites are manganese-zinc and nickel-zinc spinels, respectively. The most common chemical sources of electric current (for example, the Leclanché cell and mercury cell) use zinc as the negative electrode. N. N. S EVRIUKOV Zinc in the organism. As a biogenic element, zinc is always present in the tissues of plants and animals. The average content of zinc in most terrestrial and marine organisms is on the order of thousandths of a percent. Fungi, especially poisonous ones, are rich in zinc, as are lichens, coniferous plants, and certain marine invertebrates, such as oysters (0.4 percent dry weight). Calamine plants, which accumulate zinc, are encountered in zones of rocks with high zinc content. Plants obtain zinc from the soil and water, while animals obtain it through food.

In man, the daily requirement of adults for zinc is 5–20 mg and is met by ingestion of bread products, meat, milk, and vegetables; in infants, the zinc requirement of 4–6 mg is met by breast milk. The biological role of zinc is related to its participation in enzymatic reactions that occur in cells. Zinc is a constituent of a number of important enzymes, such as carbonic anhydrase and various dehydrogenases and phosphatases, that are involved in respiration and other physiological processes and of proteinases and peptidases, which participate in protein metabolism. It is also a constituent of enzymes of nucleic-acid metabolism, such as RNA-polymerase and DNA polymerase. Zinc plays an important role in the synthesis of messenger RNA on the corresponding DNA segments (transcription) and in the stabilization of ribosomes and biopolymers (RNA, DNA, and some proteins). In plants, in addition to participation in respiration, protein metabolism, and nucleic-acid metabolism, zinc regulates growth, affects the formation of the amino acid tryptophan, and increases the content of gibberellins.

Zinc stabilizes various macromolecules in biological membranes and may be an integral component of these membranes; it also affects ion transport and participates in the supermolecular organization of cellular organelles. In the presence of zinc, a larger number of mitochondria is formed in a culture of Ustilago sphaerogena; in the case of insufficient zinc, the ribosomes disappear in Euglena gracilis. Zinc is necessary for the development of plant egg cells and buds (seeds are not formed in the absence of zinc). Zinc increases the resistance of plants to drought, heat, and cold. A lack of zinc leads to disturbances in cell division and to various functional diseases, such as the whitening of corn tops and rosette. In animals, in addition to participation in respiration and nucleic-acid metabolism, zinc increases the activity of the sex glands and affects the formation of the fetal skeleton. It has been shown that a zinc deficiency in nursing rats leads to a decrease in RNA content and protein synthesis in the brain and to slower brain development. A zinc-containing protein has been isolated from the saliva of the human parotid gland.

It is believed that this protein stimulates the regeneration of the cells of the taste buds and aids the function of the taste buds. Zinc protects the organism from the effects of cadmium. M. I S HKOL’NIK Medical importance. A zinc deficiency in the body leads to dwarfism and retardation of sexual development. According to experimental data, excess zinc in the body can result in carcinogenic phenomena and can also adversely affect the heart, blood, and gonads. Certain occupational injuries may be related to the deleterious effects of both metallic zinc and zinc compounds. Cases of metal fume fever are possible during the melting of zinccontaining alloys. Zinc preparations in the form of solutions (zinc sulfate) and as a component of powders, pastes, ointments, and suppositories (zinc oxide) are used in medicine as astringents and antiseptics. A. A. K What does metallic element mean?

definition, meaning and pronunciation (Free English Language Dictionary) metal ; metallic element Hypernyms ("metallic element" is a kind of...): chemical element ; element (any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter) Hyponyms (each of the following is a kind of "metallic element"): alkaline earth ; alkaline-earth metal (any of the bivalent metals of group II of the periodic table (calcium or strontium or barium or magnesium or beryllium)) atomic number 62 ; samarium ; Sm (a grey lustrous metallic element of the rare earth group; is used in special alloys; occurs in monazite and bastnasite) atomic number 44 ; Ru ; ruthenium (a rare polyvalent metallic element of the platinum group; it is found associated with platinum) atomic number 37 ; Rb ; rubidium (a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite) atomic number 45 ; Rh

 ; rhodium (a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum) atomic number 75 ; Re ; rhenium (a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum) atomic number 88 ; Ra ; radium (an intensely radioactive metallic element that occurs in minute amounts in uranium ores) atomic number 91 ; Pa ; protactinium ; protoactinium (a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead) atomic number 61 ; Pm ; promethium (a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium) atomic number 59 ; Pr ; praseodymium (a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process) atomic number 19 ; K ; potassium (a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and

 reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite) atomic number 84 ; Po ; polonium (a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor) atomic number 46 ; palladium ; Pd (a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry) atomic number 76 ; Os ; osmium (a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known) atomic number 41 ; Nb ; niobium (a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium) atomic number 28 ; Ni ; nickel (a hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite) atomic number 93

 ; neptunium ; Np (a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium) atomic number 60 ; Nd ; neodymium (a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium) atomic number 21 ; Sc ; scandium (a white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite) atomic number 11 ; Na ; sodium (a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)) alkali metal ; alkaline metal (any of the monovalent metals of group I of the periodic table (lithium or sodium or potassium or rubidium or cesium or francium)) atomic number 40 ; zirconium ; Zr (a lustrous grey strong metallic element resembling titanium; it is used in nuclear reactors as a neutron

 absorber; it occurs in baddeleyite but is obtained chiefly from zircon) atomic number 30 ; zinc ; Zn (a bluish-white lustrous metallic element; brittle at ordinary temperatures but malleable when heated; used in a wide variety of alloys and in galvanizing iron; it occurs as zinc sulphide in zinc blende) atomic number 39 ; Y ; yttrium (a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys) atomic number 70 ; Yb ; ytterbium (a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime) atomic number 23 ; V ; vanadium (a soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadinite) atomic number 92 ; U ; uranium (a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons) atomic number 74 ; tungsten ; W ; wolfram (a heavy grey-white metallic element; the pure form is used mainly in electrical applications;

 it is found in several ores including wolframite and scheelite) atomic number 22 ; Ti ; titanium (a light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite) atomic number 50 ; Sn ; tin (a silvery malleable metallic element that resists corrosion; used in many alloys and to coat other metals to prevent corrosion; obtained chiefly from cassiterite where it occurs as tin oxide) atomic number 69 ; thulium ; Tm (a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime) atomic number 90 ; Th ; thorium (a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands) atomic number 81 ; thallium ; Tl (a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in

 rodent and insect poisons; occurs in zinc blende and some iron ores) atomic number 65 ; Tb ; terbium (a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite) atomic number 43 ; Tc ; technetium (a crystalline metallic element not found in nature; occurs as one of the fission products of uranium) atomic number 73 ; Ta ; tantalum (a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite) atomic number 38 ; Sr ; strontium (a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite) atomic number 42 ; Mo ; molybdenum (a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel) atomic number 80 ; Hg ; hydrargyrum ; mercury ; quicksilver (a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures)

 atomic number 25 ; manganese ; Mn (a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals) atomic number 29 ; copper ; Cu (a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor) atomic number 27 ; Co ; cobalt (a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition) atomic number 24 ; chromium ; Cr (a hard brittle multivalent metallic element; resistant to corrosion and tarnishing) atomic number 55 ; caesium ; cesium ; Cs (a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal) atomic number 58 ; Ce ; cerium (a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group) atomic number 98 ; californium ; Cf (a radioactive transuranic element; discovered by bombarding curium with alpha particles)

 atomic number 20 ; Ca ; calcium (a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals) atomic number 48 ; cadmium ; Cd (a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores) atomic number 83 ; Bi ; bismuth (a heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals) What does atomic number 30 mean?

definition and meaning (Free English Language Dictionary) atomic number 30; zinc ; Zn Hypernyms ("atomic number 30" is a kind of...): metal ; metallic element (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.) Hyponyms (each of the following is a kind of "atomic number 30"): spelter (impure zinc containing about three percent lead and other impurities (especially in the form of ingots)) Learn English with...

Proverbs of the week "You can't have it both ways." (English proverb) "A handful of love is better than an oven full of bread" (Breton proverb) "Nice guys finish last." (American proverb) "The grass is always greener on the other side." (Danish proverb) Related FAQs: Atomic number 30: Synonyms in English zinc ; Zn ; metallic element ; metal Related Definitions for "atomic number 30": a bluish-white lustrous metallic element; brittle at ordinary temperatures but malleable when heated; used in a wide variety of alloys and in galvanizing iron; it occurs naturally as zinc sulphide in zinc blende1 Element 30 - definition of Element 30 by The Free Dictionary Element 30 - definition of Element 30 by The Free Dictionary Related to Element 30: Element 31 zinc (zĭngk) n. Symbol Zn A bluish-white, lustrous metallic element that is brittle at room temperature but malleable with heating.

It is used to form a wide variety of alloys including brass, bronze, various solders, and nickel silver, in galvanizing iron and other metals, for electric fuses, anodes, meter cases and batteries, and in roofing, gutters, and various household objects. US pennies minted after 1982 consist of a copper-clad zinc core. Atomic number 30; atomic weight 65.38; melting point 419.53°C; boiling point 907°C; specific gravity 7.134 (at 25°C); valence 2. See Periodic Table . tr.v. zinced, zinc·ing, zincs or zincked or zinck·ing or zincks To coat or treat with zinc; galvanize. [German Zink, possibly from Zinke, spike (so called because it becomes jagged in the furnace), from Middle High German zinke, from Old High German zinko.] zinc (zɪŋk) n 1.

(Elements & Compounds) a brittle bluish-white metallic element that becomes coated with a corrosion-resistant layer in moist air and occurs chiefly in sphalerite and smithsonite. It is a constituent of several alloys, esp brass and nickel-silver, and is used in die-casting, galvanizing metals, and in battery electrodes. Symbol: Zn; atomic no: 30; atomic wt: 65.39; valency: 2; relative density: 7.133; melting pt: 419.58°C; boiling pt: 907°C 2. (Metallurgy) informal corrugated galvanized iron [C17: from German Zink, perhaps from Zinke prong, from its jagged appearance in the furnace] ˈzincic, ˈzincous, ˈzincoid adj (zɪŋk) n., v. zincked zinced (zɪŋkt) zinck•ing zinc•ing (ˈzɪŋ kɪŋ) n. 1.

a ductile, bluish white metallic element: used in making galvanized iron and other alloys, and as an element in voltaic cells. Symbol: Zn; at. wt.: 65.37; at. no.: 30; sp. gr.: 7.14 at 20°C. v.t. 2. to coat or cover with zinc. [1635–45; < German Zink, perhaps derivative of Zinke(n) prong, from the spikelike form it takes in a furnace] zinc (zĭngk) Symbol Zn A shiny, bluish-white metallic element that is brittle at room temperature but is easily shaped when heated. It is widely used in alloys such as brass and bronze, as a coating for iron and steel, and in various household objects. Zinc is essential to the growth of humans and animals. Atomic number 30. See Periodic Table .

Zinc The World's Fastest Dictionary : Vocabulary.com LISTS atomic number 40 a lustrous grey strong metallic element resembling titanium atomic number 10 a colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts atomic number 20 a white metallic element that burns with a brilliant light atomic number 30 a bluish-white lustrous metallic element atomic number 41 a soft grey ductile metallic element used in alloys atomic number 42 a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel atomic number 43 a crystalline metallic element not found in nature atomic number 44 a rare polyvalent metallic element of the platinum group atomic number 45 a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum atomic number 46 a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry atomic number 47 a soft white precious univalent metallic element

 having the highest electrical and thermal conductivity of any metal; occurs in argentite and in free form; used in coins and jewelry and tableware and photography atomic number 48 a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores atomic number 49 a rare soft silvery metallic element atomic number 50 a silvery malleable metallic element that resists corrosion atomic number 60 a yellow trivalent metallic element of the rare earth group atomic number 70 a soft silvery metallic element atomic number 80 a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures atomic number 90 a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands atomic number 4 a light strong brittle grey toxic bivalent metallic element atomic number 100 a radioactive transuranic metallic element produced by bombarding plutonium with neutrons Zinc | Define Zinc at Dictionary.com zinc noun 1.

Chemistry. a ductile, bluish-white metallic element: used in making galvanized iron, brass, and other alloys, and as an element in voltaic cells. Symbol: Zn; atomic weight: 65.37; atomic number: 30; specific gravity: 7.14 at 20°C. 2. a piece of this metal used as an element in a voltaic cell. verb (used with object), zincked or zinced [zingkt] /zɪŋkt/ (Show IPA), zincking or zincing [zing-king] /ˈzɪŋ kɪŋ/ (Show IPA) 3. to coat or cover with zinc. Origin of zinc German 1635-1645 1635-45; < German Zink, perhaps derivative of Zinke(n) prong, tine, from the spikelike form it takes in a furnace Related forms Examples from the Web for zinc Expand Sally of Missouri R. E. Young In such a case, two, three, or more cells are connected so that the zinc of one is joined to the copper plate of the other.

Physics Willis Eugene Tower British Dictionary definitions for zinc Expand noun 1. a brittle bluish-white metallic element that becomes coated with a corrosion-resistant layer in moist air and occurs chiefly in sphalerite and smithsonite. It is a constituent of several alloys, esp brass and nickel-silver, and is used in die-casting, galvanizing metals, and in battery electrodes. Symbol: Zn; atomic no: 30; atomic wt: 65.39; valency: 2; relative density: 7.133; melting pt: 419.58°C; boiling pt: 907°C 2. C17: from German Zink, perhaps from Zinke prong, from its jagged appearance in the furnace Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd.

1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Word Origin and History for zinc Expand n. 1650s, from German Zink, perhaps related to Zinke "prong, point;" said to have been used first by Paracelsus (c.1526) on analogy of the form of its crystals after smelting. Zinke is from Old High German zint "a point, jag," from Proto-Germanic *tindja "tine" (cf. Old Norse tindr "point, top, summit," Old English tind "prong, spike;" cf. tine ). Online Etymology Dictionary, © 2010 Douglas Harper Zinc - Credo Reference Topic Page: Zinc Definition: zinc from Dictionary of Energy Chemistry.

a metallic element having the symbol Zn, the atomic number 30, an atomic weight of 65.38, a melting point of 419°C, and a boiling point of 907°C; a lustrous, bluish-white transition metal found in ores and used for many industrial purposes such as alloys, galvanized metals, and dry-cell batteries. Zinc is an essential nutrient element in soils and animals. Summary Article: zinc from The Columbia Encyclopedia Image from: Zincite and franklilnite in Guide to Minerals, Rocks and Fossils metallic chemical element; symbol Zn; at. no. 30; at. wt. 65.38; m.p. 419.58 degrees Celsius; b.p. 907 degrees Celsius; sp. gr. 7.133 at 25 degrees Celsius; valence +2. Zinc is a lustrous bluish-white metal. It is found in Group 12 of the periodic table.

It is brittle and crystalline at ordinary temperatures, but when heated to between 110 degrees Celsius and 150 degrees Celsius it becomes ductile and malleable; it can then be rolled into sheets. It is a fairly reactive metal. Although zinc is not abundant in nature, it is of great commercial importance. It is used principally for galvanizing iron, but is also important in the preparation of certain alloys, e.g., Babbitt metal, brass, German silver, and sometimes bronze. It is used for the negative plates in certain electric batteries and for roofing and gutters in building construction. Since the metal reacts with dilute mineral acid to liberate hydrogen, it is often used for this purpose in the laboratory. Zinc compounds are numerous and are widely used. Perhaps most important is zinc oxide, or zinc white, a versatile compound with many uses. Other zinc compounds include zinc chloride, used as a wood preservative, in soldering fluxes, as a mordant in dyeing textiles, and in adhesives and cements; and zinc sulfide, used in making lithopone as well as television screens and X-ray apparatus.

The chromate, zinc yellow, serves as a pigment; sodium zincate, as a water softener and as a flocculating agent in water purification. The crystalline sulfate is known commonly as white vitriol. Zinc is essential to the growth of many kinds of organisms, both plant and animal. It is a constituent of insulin, which is used in the treatment of diabetes. Zinc supplements, taken at the first appearance of symptoms, may reduce the severity of the common cold. Research suggests that a zinc deficiency can lead to excessive inflammation when the immune system responds to infection, and that zinc acts to slow the immune response, limiting inflammation. Chief sources of zinc are the sulfide ore, zinc blende, or sphalerite (called also blende or "black Jack"); zincite, an oxide; calamine, a silicate; and smithsonite, the zinc carbonate. Zinc ores are widely and abundantly distributed throughout the world. The United States is the leading producer. The metallurgy of zinc depends upon the ore used. The sulfide ore is roasted to the oxide, then mixed with coal and heated to 1,200 degrees Celsius.

The zinc vaporizes and is condensed outside the reaction chamber and cast into blocks called spelter. In another method the ore is processed by flotation, filtering, roasting, and leaching; the resulting solution is filtered and the zinc removed by electrolysis. The Columbia Encyclopedia, © Columbia University Press 2016

Question: Which bluish-white metallic element has the atomic number 30?
Answer: ZINC